Variable Interest Entities - Activity of Alternative Energy Partnership Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Income Tax Expense (Benefit) Recognized from Alternative Energy Partnership	$ 76.0	$ (74.8)	$ (84.4)
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Cash distribution from Investment	2.0	2.0	3.3
Income (Loss) on Investments in Alternative Energy Partnership	2.3	2.9	(19.9)
Income Tax Credits Recognized	0.0	0.2	4.3
Income Tax Expense (Benefit) Recognized from Alternative Energy Partnership	$ 0.5	$ 0.7	$ (3.7)